Move her so she has her own private place.
Should I move a broody hen?
I think this should be re-emphasized. She should be in her own separate housing unit for three different reasons.
1. If you want her to hatch some eggs - you need to provide a separate space for her: a nest and perhaps a small run.
2. If you want to end the broody stage you need to isolate her and basically put her into a separate quiet room for her to think things over. The PRISON Cell.
3. Isolation will also prevent her from passing on the broody flu to the other gals.
Although this is a genetic, in some respects consider her a bit deranged for sometimes she will egg-jack the other girls eggs, or sit upon NOTHING and generally be a useless poop in place. HOPEFULLY you will have eggs under her and she will do what nature intends (with a little bit more clean up care from you).
I remember one eggless broody hen who would go into another's nest and in her state smash some of the eggs that she now intends to raise.
If she is in shared housing she will think she is Godzilla Mom and steal some of the other eggs and attempt to raise them ALL. Think of one chicken sitting on a dozen or more eggs!!!
Aside from this, if the other birds are a similar breed, say Cochin, Sussex or Silkie this may encourage them all to go on strike and go broody.
I will build a special broody hen prison separate from the other birds until she hatches the eggs (
I wish her to sit on) or stops being broody. She will have access to her own separate run but I want her nowhere near my other hens.
IF you do NOT want her to sit on the eggs, provide no nest for her.
Also, I agree about the moving time. She will be an ornery bird to move - do it at night and if you desire - move the eggs YOU want her to sit on.
Also, sometimes you can even slip some young purchased chicks under her at night and she will be delighted with her accomplishment and save you the time and heat lamp of a brooder, eggs YOU want her to sit on.